Not even close: I listed the reasons Alicorn unnecessarily adheres to a dislike that are specific to this situation, and how the unpleasantness can be good for and the site by switching to non-dislike ... already it looks nothing like the reasoning you posited.

Okay, how about this*:

Alicorn knows** that she ought to like Silas. Therefore, if she had the power to like whomever she wanted, she would have chosen to like Silas. Since she hasn't chosen to like Silas, she must not have the powers she claims in the OP. Therefore, she was deluded or lying when she wrote the OP, so we can dismiss her advice

* I'm honestly just trying to understand your view. I expect that my picture of your view is still wrong in significant respects. But the best way that I know to improve my understanding is to give you my picture so far, so that you can correct it. I am not trying to characterize your view for rhetorical purposes. Again, I know that my picture is probably wrong.

** It is not enough that she ought to know, any more than we should dismiss the hitman's advice on how to kill just because he is so clearly wrong about when to kill.